Python3练习题系列（02）

时间：2025-02-01 21:36:20

题目：

思考循环结构，看看它是怎样运行的，对我们认识程序有何益处。

知识点：

list, for-loop, range

练习代码：

练习1

the_count = [1, 2, 3, 4, 5]

# this first kind of for-loop goes through a list

for number in the_count:

    print('This is count %d' % number)

结果：

This is count 1

This is count 2

This is count 3

This is count 4

This is count 5

练习2

fruits = ['apples', 'oranges', 'pears', 'apricots']

for fruit in fruits:

    print('A fruit of type: %s' % fruit)

结果：

A fruit of type: apples

A fruit of type: oranges

A fruit of type: pears

A fruit of type: apricots

练习3

change = [1, 'pennies', 2, 'dimes', 3, 'quarters']

for i in change:

    print('I got %r' % i)

# notice we have to use %r since we don't know what's in it.

结果：

I got 1

I got 'pennies'

I got 2

I got 'dimes'

I got 3

I got 'quarters'

练习4

elements = []

for i in range(0, 6):

    print('Adding %d to the list.' % i)

    elements.append(i)

结果：

Adding 0 to the list.

Adding 1 to the list.

Adding 2 to the list.

Adding 3 to the list.

Adding 4 to the list.

Adding 5 to the list.
for i in elements:

    print('Element was: %d' % i)

结果：

Element was: 0

Element was: 1

Element was: 2

Element was: 3

Element was: 4

Element was: 5

来自《笨办法学Python》

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